s = {2, 2, 45, 6}
print(s)
# 集合中只能储存不可变数据类型
# s = {2, 3, [1, 12]}
s = {}      # 字典
print(s, type(s))
s = set()  # 空集合
print(s, type(s))
s = set('hello')
print(s, type(s))
print("max", max(s))
print("min", min(s))
print('o在集合中存在吗', 'o' in s)
del s
# print(s)